06 Reduce Downtime with Blue-Green Updates

Difficulty: Beginner

Estimated Time: 20-25 minutes

In this scenario, you will get not one, but two full delivery systems up and running in parallel: a blue and a green.

The blue version adds SonarQube to the toolchain, showing how we could upgrade the delivery system in parallel with the "live" green version which development teams are using right now.

Now let's get started!

Manuel Pais

In this scenario we highlighted that it is possible to instantiate two versions of our delivery system in parallel, where one is the current "live" version that teams see, and the other is a new version that we can test and ensure everything is running smoothly before switching traffic from the live version to the new one.

Your environment is currently being packaged as a Docker container and the download will begin shortly. To run the image locally, once Docker has been installed, use the commands

cat scrapbook_manuelpais_treating-your-pipeline-as-a-product/05-blue-green-updates_container.tar | docker load

docker run -it /manuelpais_treating-your-pipeline-as-a-product/05-blue-green-updates:

Restart Scenario

Next Scenario

Step 1 of 4

Check nothing is running

First, click the "Blue CI/CD Pipeline" tab on your right, or follow:

https://[[HOST_SUBDOMAIN]]-843-[[KATACODA_HOST]].environments.katacoda.com/

You should see a message similar to this showing that there is nothing running on the host yet:

step1-empty-toolchain

Next, click the "Green CI/CD Pipeline" tab on your right, or follow:

https://[[HOST_SUBDOMAIN]]-80-[[KATACODA_HOST]].environments.katacoda.com/

You should see a message similar to this showing that there is nothing running on the host yet:

step1-empty-toolchain

Terminal

Green CI/CD Pipeline

Blue CI/CD Pipeline

cd <directory>	Change directory
ls	List directory
echo 'contents' > <file>	Write contents to a file
cat <file>	Output contents of file

i	In Command Mode	Change into Insert Mode, you can now insert and edit text in the file
esc	In Insert Mode	Change into Command Mode, you can now execute commands
:wq	In Command Mode	Save and Exit

Welcome!

06 Reduce Downtime with Blue-Green Updates

Congratulations!

You've completed the scenario!

Scenario Rating

Steps